﻿using System;
using System.Net;
using System.Windows;
using System.Windows.Navigation;
using System.Windows.Threading;
using Google_Plus.Types;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using Microsoft.Phone.Tasks;
using System.Threading;
using System.Diagnostics;

namespace Google_Plus
{
    public partial class App : Application
    {
        public static AppSettings Settings = new AppSettings();

        public static CookieContainer Cookies = new CookieContainer();
        public static Session Session;

        public static Dispatcher UIDispatcher = Deployment.Current.Dispatcher;
        public static ProgressIndicator Progress = new ProgressIndicator();

        private static MainViewModel viewModel = null;

        /// <summary>
        /// A static ViewModel used by the views to bind against.
        /// </summary>
        /// <returns>The MainViewModel object.</returns>
        public static MainViewModel ViewModel
        {
            get
            {
                // Delay creation of the view model until necessary
                if (viewModel == null)
                    viewModel = new MainViewModel();

                return viewModel;
            }
        }

        /// <summary>
        /// Provides easy access to the root frame of the Phone Application.
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public static PhoneApplicationFrame RootFrame { get; private set; }

        /// <summary>
        /// Constructor for the Application object.
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();

            // Show graphics profiling information while debugging.
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // Display the current frame rate counters
                Application.Current.Host.Settings.EnableFrameRateCounter = true;

                // Show the areas of the app that are being redrawn in each frame.
                //Application.Current.Host.Settings.EnableRedrawRegions = true;

                // Enable non-production analysis visualization mode, 
                // which shows areas of a page that are handed off to GPU with a colored overlay.
                //Application.Current.Host.Settings.EnableCacheVisualization = true;

                // Disable the application idle detection by setting the UserIdleDetectionMode property of the
                // application's PhoneApplicationService object to Disabled.
                // Caution:- Use this under debug mode only. Application that disables user idle detection will continue to run
                // and consume battery power when the user is not using the phone.
                PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled;
            }
        }

        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
            Settings.AddOrUpdateValue("Logged", false);
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
            if (!e.IsApplicationInstancePreserved)
            {
                (App.viewModel as MainViewModel).NeedRefreash = true;
                SignIn();
            }
        }

        public static Action SignedInCallback;
        public static void SignIn()
        {
            Settings.AddOrUpdateValue("Logged", false);
            if (App.Settings.GetValueOrDefault<string>("password", "") == "")
                RootFrame.Navigate(new Uri("//Pages/LoginPage.xaml", UriKind.Relative));
            else
            {
                App.Progress.IsIndeterminate = true;
                App.Progress.Text = "Signing in...";
                App.Progress.IsVisible = true;
                LoginPage.Login(App.Settings.GetValueOrDefault<string>("email", ""),
                    App.Settings.GetValueOrDefault<string>("password", ""),
                    success =>
                    {
                        if (success)
                            App.Session = new Session(success2 =>
                            {
                                if (success2)
                                {
                                    Settings.AddOrUpdateValue("Logged", true);
                                    App.Progress.IsVisible = false;
                                    if (SignedInCallback != null)
                                    {
                                        UIDispatcher.BeginInvoke(SignedInCallback);
                                        SignedInCallback = null;
                                    }
                                }
                                else
                                    MessageBox.Show("Login failed");
                            });
                        else
                            RootFrame.Navigate(new Uri("//Pages/LoginPage.xaml?wrong=true", UriKind.Relative));
                    });
            }
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
        }

        // Code to execute if a navigation fails
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (e.Uri.IsAbsoluteUri && (e.Uri.Scheme == "http" || e.Uri.Scheme == "https"))
            {
                WebBrowserTask task = new WebBrowserTask();
                task.Uri = e.Uri;
                task.Show();
                e.Handled = true;
                return;
            }
            if (Debugger.IsAttached)
            {
                Debugger.Break();
            }
        }

        // Code to execute on Unhandled Exceptions
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (e.ExceptionObject.Message != "ExitAppException")
            {
                if (Debugger.IsAttached)
                    Debugger.Break();
                else if (MessageBox.Show("App has ran into an unknown problem, do you want to report it?\nClick OK to report and exit, Cancel to exit without reporting", "Error detected", MessageBoxButton.OKCancel) == MessageBoxResult.OK)
                {
                    EmailComposeTask task = new EmailComposeTask();
                    task.To = "cnsimonchan@gmail.com";
                    task.Subject = "Bug Report";
                    task.Body = "Your message: \n\n" + e.ExceptionObject.ToString();
                    task.Show();
                    Thread.Sleep(2000);
                    MessageBox.Show("Press OK to exit.");
                }
            }
        }

        #region Phone application initialization

        // Avoid double-initialization
        private bool phoneApplicationInitialized = false;

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render.
            RootFrame = new OrientationLockableTransitionFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;

            // Handle navigation failures
            RootFrame.NavigationFailed += RootFrame_NavigationFailed;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        // Do not add any additional code to this method
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame.Navigated -= CompleteInitializePhoneApplication;
        }

        #endregion
    }
}